Rotary ventilator



Maly4 10, 1932. v. H. MEADOWS 4 ROTARY VENTILATOR Filed oct. so. 1929HlI ' AH'orneys Patented May 10, 1932 UNITED STATES VAUGHN H. MEADOWS,Aor Los `ANnaranjas, cueLrromvrA` noTARY vEN'rILA'roeV Application meaoctober 30,1929. serial Np, 403,523,"v

This invention relates to heating and ven,- tilating, and has for anobject the provision of an improved rotary ventilator. y

A more `detailed object is the provision of a rotary ventilatorincluding a rotor head provided with a pluraltiy of driving bladesadapted to impart rotation to the head by energy derived by aircurrents, and also having a plurality of draftvanes adapted to createadraft within the ventilator pipe upon the end of which the device of thepresent invention is mounted, by withdrawing the airor other .gases fromthe associated end of the ventilator pipe, 'and discharging thiswithdrawn air laterally from the ventilator.

Another object is the provision of a rotary ventilator as described,whichk is also pro-V vided with a deflector plate capable of cooperatingwith the draft blades to increase their efliciency by acting as a bafflecapable of altering the direction of the air leaving the ventilatorpipe, into its new direction wherein it moves substantiallyperpendicularly' to the direction in which it moved `while within theventilator pipe. In this manner, the deiector plate is capable ofsubstantiallyelim-Vv inating eddy currents which so seriously hamper theeicient operation of ventilators not Iso equipped. '30

A further object is the provision of a rotary ventilator of thepclassdescribed, provided with anti-friction bearings interposed between therotor head and its supporting structure; 'with the resultl that i windand other aircurrents of very low velocity, are 1fapable of impartingrotarymovement to the ead. Y l i still further object is the provisionof a` rotary ventilator as describedwhich isof an exceedinglysimplenature, and which consequently, is relatively inexpensive tomanu?` facture,iand yet which is capable of operat ing withpa. highdegreeof efficiency in carry- .45. ing out the functions for which itwas designed. Y -4 The invention. possesses other objects andadvantageous features, some of which, with thoseenumerated, will be setforth in the folV lowing description of the inventions particularembodiment which is illustrated inthe 'upper face 22 of thecollar 18Vlis roundedinto m drawing` accompanying and forming a part of thespecification. Y

Referring4 to the drawing: p y

The' figure is a vertical, medial, sectional view taken through arotaryrv ventilator con- 55 structed infaccordance with the principlesof the present invention. i

Speci fic ally `describing the ventilator in the most practicalembodiment thereof 'of which I am at present aware,V it comprises ,asleeve 60 6 of suitable dimensions to permit its being., attached-to theouteriend of a' ventilator pipe (not shown) in such a manner as to forma continuation thereof. The sleeve '6 may be provided with suitablebeads 7 extending 65 eircumferentially thereof, and a binding ring 8vcapable of "ad-ding `materially to the inherent rigidity of the sleeve6. Upper and lower sockets 9 and 10 areposi ticned axially adjacent theupper and lower "I0 ends thereof respectively, by means ofa pluraiity ofradiating .arms 11 and 12' respectively, one ,end of each arm beingrigid with the inner wallcf the sleeve 6, andthe other endof each armbeing rigidly' connected to one of the sockets 9 vor 10,' as'the casemaybe. 1n order to'position ythe sockets 94 and 10 as far apart as'practicable, the,A arms 12`asso-Y ciated'rwith the lower socket 10, aredeflected `dmv'nwards at an angle with the aXis of the 80 lselectedposition. Y

A collar 18 is rigidly secured upon the shaft 16 slightly above theupper socket 9 and preferably within the plane of the outer end 19 ofthe sleeve 6. a set screw21 or its equivalent being employed to-"rigidlyclamp the collar in adjustedposition; Preferably the substantiallyconical configuration.

Vweight of the rotor head 26 upon the upper face 22 of the collar 18. Aferrule 31 or its equivalent, may be secured to the lower end of thetube 27 to retain the parts of thebear- I, ing 29 aga-inst inadvertentdisplacement during assembly of the device, or at any time thatthe'roto'r head 26 is lifted from its positiony upon the shaft 16. ,a

A conical top plate 36 closes'the outer end of the rotor head26, and isprovided with a peripheral iange 37 whereby the top plate 36 is rigidlymounted upon the central tube 27 through the expedient of a plurality ofradiating arms 38,'each of which is rigid with the inner face of theflange 37 at its outer end, and with the central tube 27 at its innerend. A plurality of driving blades 41 are secured upon the upper'face ofthe conical top plate 36, these blades 41 being concave upon theirundersurfaces and attached to the top plate 36 in angularity therewith.The blades 41 are secured to the top plate 36 so as to extend radialllyin respect thereto, and each ris secured thereto along that edge thereofwhich leads during rotation of the head 26, in that direction which willcause a draft of air to be drawn upwards through the sleeve 6 andventilator pipe upon which it is mounted. Itis apparent therefore, thatthe'trailing edges of the platesare elevated above the top plate 3,6;with the result that when air is in motion ypast the ventilator o-fthepresent invention, it will become caught under the elevated trailingedges of the blades 41 upon one side of the head 26,' regardless of thedirection in which the air is moving. The air striking they blades uponthe opposite side, will merely impinge against the forward faces thereofwhich incline upwards away from the direction of motion of the air, withthe result that less rotational energy is received from the moving airon this side, than on the side of the ventilator where the wind catchesunder the elevated edges. Consequent-ly, rotational movement will beimparted to the entire head 26. All the blades 41 are joined at thecenter of the head 26 by means of a more or less ornamental knob 42which serves to add strength to the entire structure.

A plurality of Y draft vanes 43 extend downwards Afrom the flange 37.Each vane 43 is rigidly attached at its upper end to the flange 37, andat its lower end to a ring 44 preferably of the same diameter as theflange 37, and in alignment therewith. Each vane 43 is disposed inangularity with a radius of the head 26 drawn from the axis of rotationto that vane, theleading edge of the vane being further from the axisthan the trailing edge. Furthermore, the vanes 43 are so separated thatthere is a material space 46 between each pair of adjacent vanes 43;with the result that as the head 26 rotates, the leading or inner edges47 thereof will cut into the air inside the head 26, and due to theinertia of the air thus engaged, which tends to hold it against rotationwith the head, this air caught by the moving vanes 43, will be impelledradially outwards until it has passed the vtrailing or outer edges 48 ofthe vanes 43, passing through the spaces 46 between adjacent pairs of.vanes 43. Obviously, this will create an area of low pressure insidethe head 26, lwhich will be conducive to a development of draft ywithinthe sleeve. 6 and` the ventila-ting pipe upon which it is mounted so asto draw air or other gases therefrom, to be discharged radially outwardsfrom the rotating head 2.

Obviously, the vanes 43 also assist in imparting rotation to the head 26by energy derived from air moving therepast, because air Vmoving againstthe vanes 43, will be caught by the outermost edges 48 of the vanes 43upon one side of the head 26, and merelyy deflected by the inclinedouter surface'of the vanes 43 upon the opposite side. Whereas the windthus entrapped by the vanes 43, will tend to How into the head 26, andcounteract to a certain extent, the production of a draft of airoutwards through the sleeve 6, it should kbe remembered that the windwill engage only a relatively few of the vanes 43, i. e., only two orthree of the vanes 43 which open toward the direction from which thewind is approaching, whereas all of thel vanes 43 throughout kthe entireperiphery of the head 26, serve to pump the air outwards during rotationof the head.

A conical delector 51 is disposed inside the head 26, and flares upwardsaway from the sleeve 6. Y In other words, the ylower end 52 which issecured to the central tube 27, islower than the larger upper end 53which is provided with a flange 54 secured rigidly inside the flange 37.This conical deiiector V51 cooperates with the vanes 43 in drawing airoutwards from the sleeve 6, inasmuch asl it facilitates the deflectionkofthe moving column of air as it changes direction. In moving throughthe sleeve 6, the air moves vertiacross the head 26, eddy currents wouldbe set up which would materially interfere with the unrestricted ow ofair therethrough. Consequently, it is believed readily apparent that thepresence of the conical deflector 51, will assist in altering thedirection of movement of the air, with a material reduction or absoluteelimination of eddy currents, and thus materially increase theefiiciency ofthe entire structure.

It is to be understood that the details of the invention as hereindisclosed, are subject to alteration within the spirit or scope of theappended claim.

I claim.

A rotary ventilator, comprising a shaft, means for mounting said shaftaxially of a ventilator pipe and extending from an end thereof, and arotor head comprising a sleeve journaled on said shaft, a top platerigid with said sleeve and having a peripheral flange, a plurality ofdriving blades secured to said top plate and arranged radially of saidrotor head and angularly with respect to said plate, a plurality ofsubstantially vertical draft vanes rigid at their upper ends with saidsaid flange, a ring secured to all of said vanes adjacent their lowerends, said ring being of substantially the same diameter as said plateand said vanes being substantialy straight and disposed substantiallyvertically, each of said vanes being disposed in angularity with aradius of said head drawn through the vane, an a conical deiiectordisposed inside said head and tapering downward and inwards to saidsleeve from adjacent the upper ends of said vanes.

In testimony whereof I have signed my name to this specification.

VAUGHN H. MEADOWS.

